/Engine/Source/Runtime/Experimental/Chaos/Public/Chaos/PBDLongRangeConstraintsBase.h
Return the target length of the specified tether (= RefLength * Scale)
[FSolverReal](API\Runtime\Chaos\Chaos\FSolverReal) GetTargetLength ( const [FTether](API\Runtime\Chaos\Chaos\FPBDLongRangeConstraintsBase\FTether) & Tether ) const